Once when I was a kid, my brother convinced me to help him make a bomb by scraping all of the gunpowder from a pack of black cat firecrackers into one paper firecracker wad. We were only about 7 or 8 at the time. We were going to use it to blow the door open on our uncle's mailbox next door, but it opened up that mailbox like a flower. Good Times.
once when I was a kid, I threw a couple smoke bombs underneath the front porch of a house.
I got a butt whooopin for that.